Vortex core transitions in superfluidH3ein globally anisotropic aerogels

Abstract

Core structures of a single vortex in A-like and B-like phases of superfluid 3 He in uniaxially compressed and stretched aerogels are studied by numerically solving Ginzburg-Landau equations derived microscopically. It is found that, although any uniaxial deformation leads to a wider A-like phase with the axial pairing in the pressure-temperature phase diagram, the vortex core states in the two phases in aerogel depend highly on the type of deformation. In a compressed aerogel, the first-order vortex core transition ͑VCT͒ previously seen in the bulk B phase appears at any pressure in the B-like phase while no strange vortex core is expected in the corresponding A-like phase. By contrast, in a stretched aerogel, the VCT in the B-like phase is lost while another VCT is expected to occur between a nonunitary core and a polar one in the A-like phase. Experimental search for these results is hoped to understand correlation between superfluid 3 He and aerogel structure.

Emergence of Non-Axisymmetric Vortex in Strong-Coupling Chiral p-Wave Superconductor

“…This is also consistent with the fact that non-axisymmetric vortices only exist at low temperatures in the present work. Aoyama and Ikeda have reported that a vortex of 3 He-A can be non-axisymmetric under the existence of anisotropic scatterers [39,40]. Their model is different from ours, and the relationship between their and our results considered an important but remaining issue.…”